Environnement Envea MIR 9000, Техническое руководство, Страница: 77 / 212

Duplication prohibited
MIR 9000
Environnement
S.A
3–33
JULY 2009
Service: In OFF mode, access to the menus from the software version is protected by a
combination of keys.
NOTE : In ON mode, access to the menus is no longer protected and stored data are
instantaneous measurements and no average measurements (analyzer evaluation).
I.R Parameters nbr: choice of the number of parameters measured by infrared. The number of
parameters is limited by the correlation wheel with optical filters.
Static Gain: selection of a fixed electronic gain. This parameter is used exclusively during adjustment
of the amplification chain (static gain at 200 ).
A static gain of 0 enables activating the Auto Gain Mode.
Auto Gain: selection of an automatic electronic gain. The calculation is made according to two
different modes.
−
different electronic gain on each of the signals to obtain signals of the same amplitude. The Auto
Gain value is adjusted to the value of this signal in the number of points (50 000 points for
example).
−
Electronic gain is identical on each of the signals and is calculated so as to adjust the most
important signal to the number of points defined in the Auto Gain variable. The programmed value
is then in the form 50 001.
Optical bench T °C: choice of the set-up temperature of the optical bench in Celsius degrees.
Standard programming is at 45°C and, for the NH
3
/ H
2
O version, at 97°C.
NH
3
Mode option: enables selecting the NH
3
option for measuring this gas. The configuration of the
sequences for the step-by-step motors is defined in the "Stepping Motors ” menu.
Display Neg. Values: in ON mode, the measurements with the negative results are displayed. In
OFF mode, the measurement continues blocked at zero for negative results.
Analog Inputs nb.: choice of the number of analog inputs complementing the sample capacity and
pressure inputs.
The number of analog inputs is limited to seven on the interface 2 board, taking into account the DTP1
to DTP4 inputs (channels 17 to 20 of the MUX)
Display Alarm: in OFF mode, the alarms are not taken into account.
CAUTION: This configuration may cause damage to the analyzer; it should be used in
specific cases only.
DTP Mode option: makes it possible to select the DTP option. Configuration is defined in the
“ Configuration/DTP “ menu.
STOP